Visualization Investigation of the Plugging Effect on Open-Ended Pipe Pile Jacked in Transparent Sand
Publication: International Journal of Geomechanics
Volume 22, Issue 10
Abstract
This paper describes the findings of a study of the soil plugging progressive formation process during pipe pile penetration using a transparent soil model test. The objective of this study is to visually investigate the factors affecting the plugging effect such as the pile diameter, penetration speed, relative density, and wall thickness. To measure the plugging development, an image measurement system was utilized. It found that pile diameter, relative density, and wall thickness were more sensitively influencing factors and that changing penetration speed had a minor influence on the degree of soil plug. The visualization analysis results show that the formation of plugging is not continuous, but intermittent and progressive. The soil plug was an alternate process from formation to destruction repeatedly. In addition, it revealed that the mobilization of internal frictional resistance depends on the height of the formed plugging and that the degree of soil plug only affects the magnitude of unit internal friction resistance. The underlying dynamic evolutionary mechanism of plugging formation was further discussed. In addition, a linear empirical formula between the incremental filling ratio and plug length ratio value was proposed.
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Acknowledgments
This work was supported by the National Key Research & Development Plan (Grant No. 2021YFB2600703) and the National Natural Science Foundation of China (No. 11672066). The authors are very grateful for the financial support that made this research possible. The authors’ contributions are as follows: Liu Cong – methodology, formal analysis, investigation, writing-original draft; Tang Xiaowei – supervision, validation; Wei Huanwei – resources; Zhao Honghua – conceptualization, project administration, funding acquisition.
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© 2022 American Society of Civil Engineers.
History
Received: Aug 5, 2021
Accepted: Feb 27, 2022
Published online: Jul 28, 2022
Published in print: Oct 1, 2022
Discussion open until: Dec 28, 2022
ASCE Technical Topics:
- Computer vision and image processing
- Continuum mechanics
- Dynamics (solid mechanics)
- Engineering fundamentals
- Engineering mechanics
- Foundations
- Friction
- Geomechanics
- Geotechnical engineering
- Geotechnical investigation
- Material mechanics
- Material properties
- Materials engineering
- Methodology (by type)
- Penetration tests
- Pile foundations
- Pile tests
- Piles
- Pipe piles
- Soil dynamics
- Soil mechanics
- Soil-pipe interaction
- Solid mechanics
- Structural engineering
- Structural members
- Structural systems
- Thickness
- Walls
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